The articles on networks, concerning static IP addresses, 127.0.0.1 and others more theoretical than practical, have as a premise the concept of computer communication via the internet.
Understanding how computers talk and communicate with each other means understanding the entire functioning of the internet and networks.
Without pretending to give a computer lesson, let’s say very simply that a computer communicates on a network with other computers using a program called TCP / IP .
TCP / IP is a set of communication protocols that allow computers to transmit data between all devices on the Internet.
Its name derives from the combination of the two most important protocols of the program:
– the Transmission Control Protocol ( TCP ) which manages the sending of data or files by splitting them into small packets and putting them back together.
– the Internet Protocol ( IP ) which manages the destination of each packet so that it is sent in the right direction.
In a network, therefore, TCP is the protocol that allows applications to communicate with each other, dividing information into small packets of the same size and re-packing them when they arrive at their destination.
IP, on the other hand, is the communication that takes place between computers and makes sure that these packets arrive at the correct destination you ca also find it with lanc remastered.
TCP / IP is the standard that allows local and geographic networks to communicate and exchange information in the form of data packets.
There are four layered layers within TCP / IP and each has its own set of protocols.
Data passes over the network through these layers, in succession:
– The link layer: Ethernet or wireless
– The Internet (IP) layer that connects local networks to each other
– The transport layer (TCP and UDP) that controls host-to-host data transmission
– The application layer which is the set of data communication protocols at the process level.
For example, HTTP is the application protocol behind the World Wide Web.
To understand what the levels are, you can read about the OSI Model , the ISO standard for network communication.
If you want to see the transmission speed of the 4 levels, for pure didactic spirit, you can download the Wireshark program , start the capture of packets on your network card, and then, from the top button of the statistics, select Protocol Hierarchy .
You will be able to see the internet traffic that passes through the 4 levels and see the percentages of packets lost during transmission.
To really understand what the internet is and the TCP / IP protocol, I recommend watching this video , a bit vintage (I think it’s from 2000), which explains everything in an extremely simple way, through a kind of cartoon.